our technology correspondent has more. >> it is the place ever more people gopi to share every detal of their lives and today's big event is that now has more and a billion users. >> there is no way would where getting starting with says that i would never thought that myself or any of the people brought it would be able to be part of the black this. it is incredible. >> the student idea turned into a giant global business. this office packed with sales staff and engineers sometimes used in conventional means to get around. facebook is a young company, keen to preserve a zany upstart image. but now life is getting that the series. it needs to go on conquering new territories and prove it can make more and moreoney per i omfrts growing audience. ome countries, it is hard to see t w rehehe growth will come. in the u.k., more thth href ale population is on. thf or n america, 45% use it. in africa, only 5% have signed up and in asia, only 7% of the population are users. in india, that is changing rapidly. people are typically generation becoming used to the social order. >> i am always o